Yeah, I saw a bunch while I was hiking and camping in California in 2014. Me and two other friends stayed at a motel one night where there were several black widows and TONS of cockroaches outside our room. For people reading who don't know, the cockroaches weren't due to the motel being a dump or anything. Cockroaches run wild by the thousands in many parts of California (there were tons at one of our campsites too), so they were just a natural part of the local ecosystem.
Anyway, my two friends slept in the two beds and I slept on the floor on my sleeping pad and sleeping bag with my head within a couple feet of the door. There was the
tiniest gap under the door, so to say the least, it took me awhile to fall asleep that night! lol I was worried about either one (or several) already being in the room or one crawling into my bag as I slept, or into my shoes, but all was well. Luckily I never brought anything home. Cockroaches either. lol
I'd love to find another Northern Black Widow though. I know of areas they would probably be, but haven't gone to look for them yet. Same goes for the Black Purse-web spider, which are pretty rare, but I know of a confirmed area where they have been observed. I actually think Northern Black Widows are pretty cool looking though. The markings can vary a bit on them, but the one that crawled across my leg was identical to this one. It was very pretty.